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  1. GroupGets
  2. Manufacturers
  3. Qwerty Embedded Design
  4. LoFive RISC-V
  5. Group Buy: LoFive RISC-V

LoFive RISC-V

LoFive RISC-V
257% Funded

Progress

257% Funded
257% Funded
121 Backers
100 Unit Target
Ended 9 Months Ago
$25.00
+ shipping
Buy Disabled
257 reserved of 100 Minimum
Limited quantity of 1000 Available!
$25.00
+ shipping
Buy Disabled

Product Details

Name
LoFive RISC-V
Brand/Manufacturer
QWERTY Embedded Design, LLC
Product Description

LoFive is a lightweight SiFive Freedom E310 open source SoC evaluation kit. The E310 leverages the Free and Open RISC-V Instruction Set Architecture originally developed by UC Berkeley and now has wide industry support via the RISC-V Foundation. Don't let the board's understated name and openness fool you - this MCU packs some impressive specs and the board was designed by the prolific QWERTY Embedded Design founder, Michael Welling.

LoFive LED GIF

Schematics
LowFive Schematics
(click to open a larger image)

Specifications

  • MCU – SiFive Freedom E310 (FE310) 32-bit RV32IMAC processor @ up to 320+ MHz (1.61 DMIPS/MHz)
  • Storage - 128-Mbit SPI flash (ISSI IS25LP128)
  • Expansion - 2x 14-pin headers with JTAG, GPIO, PWM, SPI, UART, 5V, 3.3V and GND
  • Misc - 1x reset button, 16 MHz crystal
  • Power Supply - 5V via pin 1 on header; Operating Voltage: 3.3 V and 1.8 V
  • Dimensions - 38 x 18 mm (estimated)
  • License - CERN Open Hardware Licence v1.2

Resources

Blog Posts

Back Render

Why GroupGet?

This group buy will be used to fund the first batch and seed the community with a new RISC-V based microcontroller board.

External Links
Manufacturer's product page

Purchase Information

Unit Deliverable
1 LoFive
Unit Price
$25.00
Campaign Part #
GG-P-353
Availability
Not available / campaign funded, end date: Sat, 07 Oct 2017 16:59:00 -0700
Factory Lead Time

3-5 weeks after close of campaign.

Shipping Details
GroupGets will handle the shipment of orders for this product.

Options and Add-Ons

FTDI Breakout - FTDI FT2232H-56Q MINI MDL

$30.78

FTDI Breakout used for programming the LoFive.

Image of TDI FT2232H-56Q MINI MDL

Premium Female/Male 'Extension' Jumper Wires - 20 x 3" (7.62cm)

$3.50

20x3" (7.62cm) Female to Male Jumper Wires.

Female to Male Jumper Wire Image

Premium Male/Male Jumper Wires - 20 x 3" (7.62cm)

$3.50

20x3" (7.62cm) Male to Male Jumper Wires.

Male to Male Jumper Wire Image

Premium Female/Female Jumper Wires - 20 x 3" (7.62cm)

$3.50

20x3" (7.62cm) Female to Female Jumper Wires.

Female to Female Jumper Wire Image

Full sized breadboard

$8.50

This is a 'full-size' breadboard, 830 tie points. Good for small and medium projects. It's 2.2" x 7" (5.5 cm x 17 cm) with a standard double-strip in the middle and two power rails on both sides. The back is made of foam double-sided tape, if you remove the protective paper you can attach it to a flat clean surface.

Breadboard Image

Diffused RGB 5mm LED (25 pack)

$15.25

Diffused 5mm tri-color LEDs with separate red, green and blue LED chips inside!

  • Pack of 25 diffused RGB LEDs
  • 5mm diameter
  • Red: 630 nm wavelength, Green: 525 nm, Blue: 460 nm
  • Red: 1.9-2.3V Forward Voltage, at 20mA current, Green: 3.0-3.4V, Blue: 3.0-3.4V
  • Red: 3000 mcd typical brightness, Green: 5000 mcd, Blue: 900 mcd

LED Image

Through-Hole Resistors - 220 ohm 5% 1/4W - Pack of 25

$1.25

Resistor Image

How it works

This is a group buy campaign that needs to acquire at least the stated minimum amount of pledges from backers like you before the Unit Deliverable and any Add-Ons ship. We do not charge anyone until the Progress above hits 100% or greater, otherwise there is no charge. All campaign products are vetted as existing and functional so your order will be fulfilled within the Factory Lead Time if the campaign succeeds. Please see our FAQ page for more details on our billing process.
MORE

  • Odtmo2xo normal
    QwertyEmbedded

    I have just created the GroupGet for LoFive RISC-V!

    Post last edited: 10 months ago

  • 5927943?v=4
    CodeAsm

    Shipping to europe is so expensive, definitly trying to get more people to do a groupbuy for this. Netherlands anyone?

  • 9zi7mnmg normal
    GroupGets

    Another creative overseas shipping option may be to use "shipito" to send this board and items from other US sites to reduce overall shipping costs: https://www.shipito.com/en/. We used to have cheaper overseas shipping options but we had a high rate of loss of expensive items. We are re-evaluating our current stance for lower cost items going forward but unfortunately we won't have a solution implemented for this campaign.

  • 9zi7mnmg normal
    GroupGets

    Quick Update: The SiFive chips are on order and the contract manufactuer is ramping up the board fab now

    Post last edited: 8 months ago

  • 9zi7mnmg normal
    GroupGets

    Quick update: The SiFive MCU's are on the way to the CM. The test rig is being designed by Qwerty and the CM is going to produce a test panel for us to QA with before we make the full batch.

  • Photo
    Jasem Mutlaq

    Great board! I'm trying to get this but it says "Buy Disabled"... is there a way to order this now?

  • 9zi7mnmg normal
    GroupGets

    Jasem, Round 1 is closed but we are producing extras to put in our store. Check back in a few weeks.

  • Photo
    Whitham Reeve

    What is the programming procedure? How do I write to the onboard storage?

    Any documentation you can point me to would be appreciated.

  • 9zi7mnmg normal
    GroupGets

    The on-board flash is programmed via JTAG and a special version of OpenOCD built into the Freedom-E SDK.
    LoFive currently support using the FT2232H-56Q FTDI breakout adapter.

    Wire the breakout adapter as follows:

    LoFive Pin FT2232H-56Q Breakout Pin
    +5Vin VBS
    GND GND
    TRSTN AD5
    TCK AD0
    TDO AD2
    TMS AD3
    TDI AD1
    UART0.TX BD1
    UART0.RX BD0

    This will power the board and allow you to program it with an updated Freedom-E SDK.
    The Freedom-E SDK version that is ported for LoFive is here:
    https://github.com/mwelling/freedom-e-sdk

    Once the SDK is installed and compiled you can load the code via make upload.

    For instance to load the LED demo:
    make upload PROGRAM=led_fade BOARD=freedom-e300-lofive

    This SDK only supports running on Linux.